How can I reinstall the software on a different computer with more memory and GB, because the computer I downloaded it on the first time is out dated and don't have much GB so the software will not open.
Welcome to the Magix user to user forums.
Go to your Magix Account, log in, go to My Products and find the listing for your version of MM. From there you can download the installer and see the activation key which you will need to complete the installation.
Whilst in your My Products page, you might also want to deactivate the old installation of MM on your old computer. Doing that should ensure no problems with the reinstallation.
Once you have reinstalled and activated the software on your new computer, then download all the Soundpools, Instruments etc. which are available to you.
HTH
Jeff
Forum Moderator